Calculation pressure

Planning and calculation
Selection of the most suitable products for pressure maintenance | degassing | water make-up

Pressurisation & Water Quality

Balancing & Control

Thermostatic Control

engineering ADVAnTAge

Reliable pressurisation is the basic requirement for a gentle and trouble-free operation of heating, solar and cooling water systems. Our planning and calculation basics support you in choosing the right products, their size and performance.

PNEUMATEX PlAnning AnD cAlculATion

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PNEUMATEX PlAnning AnD cAlculATion

Table of contents
Page calculations 4–5 General equations Statico selection 6 7 Quick selection Equipment compresso selection 8 9 Quick selection Equipment Transfero selection 10 11 Quick selection Equipment Aquapresso selection 12 13 13 Aquapresso in potable hot water systems Aquapresso in pressure-boosting systems Aquapresso pressure losses Zeparo Selection 14 15 Approx. pressure loss (DP) – Separator Zeparo Collect Safety technology 16 Devices for sealed heating systems glossary 17 17 18 – 19 19 20 21 General terms Geometry Pressures Volumes Temperatures Capacities

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PNEUMATEX PlAnning AnD cAlculATion

calculation
Pressure maintenance Heating systems TAZ ≤ 110 °C following EN 12828, solar systems ENV 12977-1 general equations VA Water capacity of the system VA = VA central heating + VA district heating pipe VA = vA · Q + VA district heating pipe Ve = e · VA VV ≥ 0,005 · VA ≥ 3 litre P0 = HST/10 + pD + 0,3 bar ≥ pZ pa ≥ P0 + 0,3 bar Df = (pe + 1)/(pe – P0) VN ≥ (Ve + VV + 1,1 · VK 1) + 5 3) ) · Df pe ≤ PSV – ASV
VN ≥ 80 litre with Statico + Vento VK Collector volume 1) ASV = 0,5 bar for PSV ≤ 5 bar 4) pD (TAZ), table 1 : System design vA Specific water capacity, table 2 Q Installed heat capacity e Expansion coefficient for tmax, table 1

Ve Expansion volume VV Water reserve P0 Miniumum pressure 2) pa Initial pressure Statico Df Pressure factor VN Nominal volume pe Final pressure compresso VN Nominal volume pe Final pressure TecBox